
UC1608
128x240 Matrix LCD Controller-Drivers
(Revision 0.52 Preview)
7
C
ONTROL
R
EGISTERS
UC1608 contains registers which control the chip operation. These registers can be modified by commands.
The following table is a summary of the control registers, their meaning and their default value. The
commands supported by UC1608 are described in the next two sections, first a summary table, followed by
a detailed description.
Name:
The Symbolic reference of the register byte.
Note that, some symbol names refer to collection of bits (flags) within one register byte.
Default:
Numbers shown in
Bold
fonts are values after
Power-Up-Reset
and
System-Reset
..
Name
Bits
Default
Description
SL
6
0H
Start Line. Mapping from COM1 to Display Data RAM.
CR
8
0H
Return Column Address. Useful for cursor implementation.
CA
8
0H
Display Data RAM Column Address
(Used in Host to Display Data RAM access)
PA
4
0H
Display Data RAM Page Address
(Used in Host to Display Data RAM access)
Bias Ratio. The ratio between V
LCD
and V
BIAS
.
00b= 10.7
10b=12.0
Temperature Compensation (per
o
C).
00b: 0.0%
10b: -0.1%
Gain, coarse setting of V
BIAS
and V
LCD
Electronic Potentiometer to fine tune V
BIAS
and V
LCD
BR
2
2H
01b= 11.3
11b= 12.7
TC
2
0H
01b: -0.05%
11b: -0.2%
GN
2
3H
PM
6
0H
MR
1
1H
Multiplexing Rate: Number of pixel rows:
0b: 96
1b: 128
OM
2
–
Operating Modes (Read Only)
10b: Sleep
01b: (Not used)
11b: Normal
00b: Reset
BZ
1
–
Busy with internal processes (reset, changing mode, etc.)
OK for Display RAM read/write access.
RS
1
–
Reset in progress, Host Interface not ready
PC
3
7H
Power Control and panel loading.
PC[0]: 0b: LCD: <20nF
PC[2:1]: 00b: External V
LCD
01b and 10b are reserved, for UltraChip only. Please do not use.
1b: LCD: >20nF
11b: Internal V
LCD
APC0
8
2CH
Advanced Product Configuration. For UltraChip only. Please do not use.